MATERIALS FOR HIGH TEMPERATURE HEAT EXCHANGERS
Heat exchangers in recuperative units working at temperatures of 500 degrees C to over 1000 degrees C include in their materials of construction ferritic and austenitic alloy steels, nickel base alloys and engineering ceramics, the material selection depending on the combination of temperature, mechanical loading and environmental factors for each application. Exposure to the environment results in corrosion enhanced by any crevices formed during construction. Apart from corrosion resistance the heat exchanger material must have adequate mechanical properties for long-term service, in terms of creep and fatigue strength and ductility; these properties too may be affected by environmental attack. Thus, there is a need to achieve a balance between mechanical properties and corrosion resistance. The use of coatings or bimetallic tubes to enable heat exchangers to operate in particularly severe environmental conditions is discussed, as are the materials problems resulting from the forming and joining procedures needed to fabricate an engineering component.
Bibliographic Reference: ADVANCED COURSE ON HIGH TEMPERATURE HEAT EXCHANGERS, DUBROVNIK (YUGOSLAVIA), AUG. 25-30, 1985 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 31911 ORA
Availability: Can be ordered online
Record Number: 1989124007100 / Last updated on: 1987-01-01
Available languages: en